Mine-locomotive headlight



f stilts. inaiflickering lightv which is ycontus-A Fatsntsd JulyY l2, i927;

. JOHN n. ToWNsiiNn, or soUfrHBEND, INDIANA, AssiGNon, BY MnsNn AssIeNianNrs,"

To wnsTINeHoUsn nnncfmrc a. MANUFACTURING 'ooMPANiLpoF yiiAstr- PITTs- Birnen, PnNNsYIAANrAy A oonronarion or PnNNsYLvANIA.'

MINE-LocoivrorrvnnnAnnrsnn Appiicaiioii inea'o'ctober 2, 1922.- seriai No. 591,795'.

This invention relates to headlightsmore particularlyl toa special form ot headlight" t yieldingly lheld against movement in` all dif.

adapted for use on mine locomotives.`

AIn locomotives, especially in mine locomotives, itis necessary that the headlight construction shallbe such as to substantially prevent vibration therein, since vibration reing to the engineer, and the lite oit' the lamp fila-nient is greatly decreased by shocks and l jars.v It is, therefore, an'object ot this in'- vention to provide a Yheadlight mounting which shall absorb the ordinary shocks and'v jars incident to operation of the locomotive,

to increase the etliciency of the headlight and to increasethe lite of the vlamp ilament. It is a further obiectoimy invention to provide a construction which shall prevent .e

a continued swinging movement, in'any direction, of the beam of light issuing lfromthe lamp. l

It is a still further object of my invention `.to provide a structure which shall be comparatively simple, inexpensive to manufacture and eiiicient in operation. Hitherto, many attempts have been made l lto provide a headlight structure vhaving the characteristics desirable for locomotive service. To accomplish this, it was proposed toy suspend the'lamp within the casing by means Y of radial springsattached thereto and holding the same Vin Aproper position.V 'Howeveig suchv construction didnot accomplish there,- sult, since it allowed movement of the lamp in lother than radialdirections. V'To remedy 'Y this, it was proposed to place a lflat leafV spring behind the lamp structure `which should tend to hold the same in the properv position. This also failed to accomplish thev y result, since-the leaf spring merely tended to limit lthe swinging Vmotion ot .the lamp and did not prevent it. i

My invention is directed to a similar structure including a plurality of sets of springs which are so arranged as to exert a yielding supporting torceV upon the lamp ,andH its Vmounting in alldirections. Specilically, 1

,' provide a set of radial springswhich converge diagonally toward a `plane' passing through the headlight structure perpendicularly to the line of motion of the locomotive.

A second set of springs also conveigesl to said plane but from the oppositeside theresprings, the lamp vand its 'inoriinting V 'faie of. `By reason of suchan arrangementV of j rec'tions, and the tension otsaid springs allv i most entirely In theacco'mp'anying drawing, .constituting apart hereof and inwhich likey reference. 'characters' designate like, parts,

Fig, 1 is arfront elevational VAviewof new headlight;` 'f' Figi 2 isV across-sectional viewA thereof Vtaken along the linejHf-I oi' Fig. l, and y View vta-lien v,along in anyjsuitable manner, as by bolts 7 extending through the ring c L n prevents any swinging orV whipping moveinent'ot the-lamp.

casing Vis a spider consisting'ot cross pieces i, 3. and'tl secured` together by a'rivet 5. A ring is riveted tothe freeendsot members 3 and 4. The spider -issecured to the casing Thefla-mp mounting' or` supporti 8I has reflector 9 secured thereto by rivets. In the lower: portiongof saidl mounting is au lamp Vbase- 10 having a lamp .socket 11 therein pro jectingfthroughan opening in the reflector 9; Ala'mp'12is mounted in said socket.

`A set fror" tension springs 13, Vhere shown` i as two innumben v.is secured to the rear ot' the lamp support at 14 and to one of the cross pie-ces of the' spider at 15, said-springs 13 converging diagonally ina vertical planeto a plane coincident with the rear portion oft-1 the lamp support. Radial tension'springs 16-v ai'esecuiedto Vthe sides'oi'thc support 8 at points 17 and'ito the Ycross pieces ofv the spider" at points 18,' said radial springs also converg-v V ing to the; saine plane, being diagonally arranged within the casing,v C

A lens 19 is secured wit-hina holding ring 2O having radial arms 21v merging into a central ring 22,theentire structurebeing adapted to protect the lens 19rom injuryf-i. i n

`Interposed betweenthering 20 andthe lens 19 is a non-metallicw'asher 23, and a ring same in Vfixed relation-to `the ring 20 by means of screws 25 secured into the annular ei;-

'24 yon theoppositesideof thelensholds thel losv by cooperating` threaded portions 2T on the extension 26 of the ring` and the trout end of the casing l. n I

It Will be notedthat my invention pro- Vides a headlight structure 4comprisingl a reli ,a-tivelyvsmall number voil' parts which may be readily assembled andas r adily disassembled for purposes .of inspection or repair.

In order to take the entire structure apar@ it is merely necessary to unscrew ring 2O and then to remove screws 7..

A Jfurther advantage in this construction isy the plurality of setsofsprings secured to the cross pieces or" the spider and converging diagonally and secured tothe support `8. The construction prevents any swinging Amovement of the lamp relative to the easing,

at the same time allowing vsufiicient motion thereof to greatly decrease the danger ot breaking of the lampl lilament during` operav tion of the locomotive and to prevent fliehen ing of the beam ot light.

and rear portions ot said spider and converging to points oit-attachment in said supportlying in a plane intermediate said 'front and rear portions.

2. A'lieadliglit structure comprisingacasing7 a spider thereimqa support Wit-hin said spider, springs secured to the trent and rear portions of said spider and convergingv to points ot' attachment in said support lying,` in a plane intermediate.'said'front and rear portions, said plane beingl perpendicular to the aXis of said easing and means for holding a lampin said support. Y

3. A headlight structure comprising a.V casing, a spider'therein, a support within said spider, springs secured to vthe front and rear portions of said'spider and converging' to points of attachment in said support lying in a plane intermediate said front and rear K.

portions, a reflector mounted on said support and means Jfor holding a lamp in said support.

ln testimony whereof, I have hereunto subscribed my naine this 30th day of August,

JOHN R?. T ONNSEND. 

